From the Rolls-Royce experimental archive: a quarter of a million communications from Rolls-Royce, 1906 to 1960's. Documents from the Sir Henry Royce Memorial Foundation (SHRMF).
The improvements and drawbacks of the Auto Vac vacuum feed system compared to the pressure system.
| Identifier | ExFiles\Box 40\4\ Scan007 | |
| Date | 24th April 1919 | |
| Contd. -2- EH1/LG24.4.19. to faulty designm since then, however, the Auto Vac has been improved considerably. The mechanism inside looks very cheap but except for the float it has not given the least trouble. We are arranging to have experimental cars running about fitted with the vacuum feed because we consider that eventually we shall find that this scheme is a great improvement over the pressure system which we use at present. An obvious disadvantage with the vacuum feed is that if it goes wrong the car is stranded. EH. | ||